Bluetooth 5.1 & CVC 8.0 Technology: Provides low latency and stable connection with most Bluetooth devices such as iOS or Android smartphones, tablets, laptops up to 10 meters away without signal loss or music dropout. With CVC 8.0 chip, even if you are in the noisy center, it can also capture clear voice quickly. Ergonomic Design: Full in-ear Bluetooth headset with ergonomic design for business, office, driving and trucker; 180 vertical and 270 horizontal ear hook rotation, 45 headphone receiver rotation for comfortable fit and free switching between left and right ears. Long Battery Life: It only takes 1 hour to fully charge. Then the wireless earbuds can support up to 15 hours of talk time and music time and 240 hours of standby time. These Bluetooth earbuds allow you to make wireless calls and enjoy listening all day long. With the charging case you can charge 5 times (75 hours of use in total). Multifunction Buttons: The buttons on the earbud allow you to play or pause music, answer/end/reject calls, mute sounds. Activating voice control like Siri has never been easier, making this headset perfect for you. IPX7 Waterproof: Our Bluetooth headset has IPX7 waterproof and sweatproof design, don't worry no matter you are sweating or raining, staying inside or working out, your earbuds are in full protection.